Then how do you know that the magic spell I gave you doesn't do it "automatically"? Either you're lying and you actually a programmer, since we know you need to be a programmer to be able to read, or you somehow figured out how to read it without being one, but that would be crazy, absolutely crazy.
Anyway, if for some reason you need your system to decide when to update and reboot, there is an easily googlable setting for it, and if you just need to emulate window's "update and shutdown" button, I gave you it for my preferred Linux distribution, and it's not more complicated on all the other ones.